Blow-torch.



J. WEINTZ.

BLOW TORCH.

APPLICATION FILED JULY 9. 1910.

1,006,034, Patented 001:. '17, 1911.

JACLQB WEINTZ, or

lams CLEVELAND, OHIO.

BLOW-TORCH.

Specification of Letters Patent.

Patented Oct. 17, 1911.

Application filed July 9, 1910. Serial No. 571,107.

To all whom it may concern:

Be it known that I, JACO W'nm'rz, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and use- .fu Improvement in Blow-Torches, of which blow torch and has for its generalobjects the provision Oil a torch which may be conveniently handled and in which the flow of gas and air may be easily and closely controlled.

The preparation of molds for casting involves the drying or baking of the surface of t] a sand which forms the mold, so that no steam will be formed when the molten metal comes into contact with the mold. The torch, which the present invention provides, is especially adapted for use in drying the surfaces of molds, but it, of course, be adapted to many other uses.

To the accomplishment of these and related ends said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

' The annexed drawin;- and the following description set forth in detailcertain mechanism embodying the invention, such disclosed. means constituting, however, but one of various mechanical forms in which the principle of the invention may be, used.

In said annexed drawing:--Fignre 1 is a central vertical section of a torch embodying my invention; Fig. 2' is an end elevation looking from the left in Fig. 1; Fig. 3 is an end elevation looking from the right in Fig. 1; Fig. 4 is a vertical section on the line 1"4: iii-Fig. 1; Fig. 5 is a section on the line 5--5 in Fig. 1; F igi 6 is a section on the line 66 in Fig. 1; Fig. 7 is a section on the line 7-7 in Fig. 1; Fig. 8 is a section on the line 8--8 in Fig. 1; Fig. 9 is a section on the line 99 in Fig. 1; and Fig. 10 is a detail sectional. View on the plane of the section line 10-1O of Figs. 5 and 9.

The torch. comprises a body composed of the cylindrical portion A and the handle portion A. An air passage B extends through the body and a gas" passage C also I extends through the body, and in the cylindricalportion A ofthe body the gas passage C iswithin, and concentric with, the air passage B, the two passages having a common orifice a. On a plane removed from the orifice d the wall which separates the air passage B and the gas passage C is perforated by a circle of communicating openings c.

Inserted in the outer end of the cylindrical body portion A, in the annular space between such body portion proper and the walls of gas passage C, is a tubular member Z) sub-dividing such annular passage at its outer end into two concentric chambers 7) and 6 Communication between the main air passage and these two terminal chambers, into which it is sub-divided, is con trolled by two sets of ports in a transverse wall Z) formed integral with the inner end of tubular member I), and a. rotatable tubir lar member 7) disposed within the air passage B and provided With an aperturcd flange 6 which bears against such wall. Of thcaperturcs or ports in the wall, one set U considerably smaller than the other,

and communicates with the concentric chamber b nearest the center of axis ofthc device, while the other larger apertures b communi :ate with the outer concentric chamber. The apertures I) in the rotatable valve member are of such a size and disposition as to be capable, in different axial positions of said member, to close both such sets of apertures 71" and [2 in the wall I), or to open either or both as desired, (see Figs. 5 and. 9). In order to position such member Z) to cause the apertures therein thus variously to register with those in the wall I) a rotatable sleeve, 7) is mounted exteriorly on the cylindrical portion A of the body andthrough a slot 6, in the wall of thc body a screw 7) rigidly connects the sleeve 7) and the member I). By rotation of said sleeve i), which is designed to be manually ell'ected, a corresponding rotation of the inner valve member 5'. as it may be termed, will obviously be obtained. Said sleeve, or the valve member, will of course be fitted to the body portion A tightly enough to cause said valve member to remain wherever it may be thus placed by the operators hand.

From the foregoing description, it will be seen that the body portion in question has I end of the gas supply passage C, whilethe two remaining orilices a. and a" are the outer ends of the concentric chambers 71* and 1) into which the terminal portion of the air passage A is subdivided by member Z1".

The air passage '15 is primarily controlled by a valve 1) which is held to its seat by a spring 1! and is openahle by pressure upon the valve stem J. A similar valve E controls the gas passage, and it is held to its seat by a spring and is openable by pressure upon its valve stem a. The valve stems d and c are disposed that when the operator grasps the. handle portion of the torch these valve stems will lie under his lingers so that bv mere closure ot his hand the valves ma be operated. leak-port e leads past the gas yalve i and a tube extends from the leak-port. to a point adjacent the oril'ice. a. the tube 1- being disposed centrally within the gas passage U.

in operation the torch will be connected with an air and a gas supply by any suits able pipes, although, preferably, flexible connections will be used for this purpose where the torch is to be carried from one place to another. The lcaleport past the. gas valve and the tube extending from it l'orms a pilot light at. the oritice o1 the passages. which after once being lighted will continue to burn, because there is no means lior closing the llow of gas through the port and tube. Assuming. then, the control valve in the outer portion of the air passage. to

be so disposed as to close both sets o'l NIH-1*.

ttil'es or ports in wall 0, and further that air and gas are admitted into their respet live passages by pressure ot the operators lingers to open the control \alvcs l) and i resptative'ty, the will lind a direct escape through its passage and oritice (1, whereas the air can only escape by entering such gas passage through the series ole an nular apertures c in the lattters wall, and mingling with the i'\ very line pcncih like llalne is thus secured, such as is desir able, where the torch is being used in coin nection with the molding operation hereinbel'ore suggested. to reach the inner corners and recesses 01' the mold that is being dried. It now a more extended or broader ll:ttiit is desired. this will be secured by rotating the valve member (1 to open the smaller set of passages I)" in the wall I) to the escape of air lherethrough by way of annular orili e t". The air in passing by apertures will exercise a sutlicient suction etl'cct to draw through said apertures the necessary amount of gas to torm a combustive mixture, when mingled with the gas that now escapes from the central oritice (t practically tree from air. Next by rotating valve member l) to open both sets of apertures in wall 1) a tlame will issue l'rom the torch equal in cross-section at its base to the full cross'scean equally broad flame is secured, but without the intensity of the one just described,

since no combustive mixture is then issuing through the intermediate orifice a.

From the foregoing description it will be seen that a Wide range in the character of the flame produced and attendant heating effect of the torch follows the simple adjustment of valve 6. Whatever the adjustment in this particular, however, the flame is entirely extinguished, save for the pilot; light, the moment the torch is laid aside. This adjustment furthermore may be made while the torch is in use with almost the same case and facility that; a stream of water being discharged through a nozzle may be regulated. The compactness"and the simplicity of the structure in which these several advant ges are combined, make a torch embodying. that construction exceptionally convenientfor drying the strfaces of molds, but; it is readily apparent that by varying details of size or shape the torch may be equally well suited for other purposes.

Uther modes oi. applying'the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, prov ided the means stated by any one of the following claims or the equivalent of such stated means be employed.

l therefore particularly point out and.

distinctly claim as my invention l. A device of the character described, comprisinga body provided with concentric air and gas passages having a common orilice, and with a connnunicatmg opening between said passages, a wall in the air passage between said orifice and opening, said wall being provided'with apertures, and means for controlling the apertures in said wait.

2. A device of the character described,

comprising a cylindrical body formed with a slot in its wall andprovidet'l with concenlrie. air and gas passages having a common orilice, and with a communicating opening between said passages, an aperturcd wall in the air passage between said orifice and opening, a tubular member within the air passage and having an apertnred flange bearing against said wall, a rotatable sleeve mounted on the body, and a member rigidly connecting said tubular member and sleeve, said member extending through the slot in the wall ot the body.

3. A device of the character described, comprising a body provided with air and gas pas ages having a connnon orifice, and with a 'olnnntnhatltlg opening between said passages, an apertured wall in the air passage between said orifice and opening, means dividing the air passage between said wall and orifice into a plurality of passages, and

means for controlling the apertures in said wall.

4. A device of the character described, comprising a cylindrical body-formed with a slot in its wall and provided with concentric air and gas passages having a common orifice, and with a communicating opening between said passages, an apertured wall in the air passage between said orifice and opening, means dividing the air passage between said wall and orifice into a plurality of concentric passages, a tubular member within the air passage and having an apertured flange bearing against said wall, a rotatable sleeve mounted on the body, and a member rigidly connecting said tubular member and sleeve, said member extending through the slot in the wall of the body.

5. A device of the character described, comprising a body provided with air and gas passages havinga common orifice, and with a communicating opening between said passages, valves for controlling said passages, the body being provided with leakport past the gas valve, and a tube extending from said. leak-port to said orifice.

6. A device of the character described, comprising a body provided with air and gas passages having a common orifice, and with a connnunicating opening between said passages, valves for controlling said passages, the body being provided with a leakport past the gas valve, a tube extending from said leak-port to said orifice, and

means disposed between said orifice and opening for controlling the air passage.

7. A device of the character described,

comprising a body provided with air and gas passages having a common orifice, and with a communicating opening between said passages, valves for controlling said passages, the body being provided with a leak-' from said lealcport to said orifice, an apertured wall in the air passage between said orifice and opening, means dividing the air passage between said wall and orifice into a plurality of concentric passages, a tubular member within the air passage and having an apertured flange bearing against said wall, arotatable sleeve mounted on the body, and a member rigidly connecting said tubular member arid sleeve, said member extending through the slot in the wall of the body.

Signed by me this 5th day of July, 1910.

JACOB WEINTZ. Attested by- D. T. Dwlns, J NO. F. OBERLIN. 

